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Inferior Wall M.I. and Right Bundle Branch Block

Fri, 10/24/2014 - 15:36 -- Dawn

This ECG shows two obvious abnormalities, right bundle branch block AND inferior wall M.I.  It is also a good teaching example of how the terminal wave of RBBB can be mistaken for the ST elevation of M.I.

First, check this ECG to see if it meets the criteria for right bundle branch block:

1)  The QRS will be wide. That is, it will be greater than or equal to .12 seconds (120 ms).  In this case, the QRS is 134 ms.

Inferior Wall MI With Artifact

Thu, 10/16/2014 - 20:11 -- Dawn

This ECG is taken from a 66-year-old man who presented to the Emergency Dept. with a complaint of chest pain.  The ECG shows clear signs of acute inferior wall MI:  ST segment elevation in Leads II, III, and aVF and reciprocal ST depression in Leads I and aVL.  In addition, there are reciprocal ST depressions in Leads V1, V2, and V3.  These indicate that the MI extends up the inferior wall into the area called by most clinicians the posterior wall.

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